When trying to charge the LB-010 using the LBC-010 and 12V/5A SMPS, the charger shows Both LEDs ON for a few seconds before turning OFF both LEDs. This is happening with multiple new batteries and with multiple chargers. What could be causing this issue?
You may have depleted battery if you have left batteries connected to the charger when not charging them.
If the battery is not charging when plugged 12V 5A SMPS, most likely the battery is depleted.
Once the Li-Po battery is depleted, the battery cell could be damaged and should be disposed properly for safety reasons.
If the problematic batteries are new out of box, please contact the reseller for RMA service.